The only foreigners I have encountered earning that kind of salary were in management (non ELT obviously) and mechanical / electrical engineers.

Salaries are slowly rising but you're about 20 yrs too early to get anywhere near that figure. If you receive an offer of half your stated figure then that's a job probably worth investigating further.

Sure, for fully-qualified and experienced international school teachers, but for TEFL-ers? Nah, not likely unless you're supplementing your main income with other work, in which case it could be achieved (at the expense of having much of a life).

The best paying TEFL jobs I know of in Indonesia pay in the 35-40jt range, but these are the exception not the norm.